2018 BMW 6 Series 3.0 640d M Sport

Overview

• Make: BMW
• Model: 6 Series
• Trim: M Sport
• Version: 3.0 640d M Sport Auto RWD Euro 6 2dr (308 bhp)
• Year: 2018
• Mileage: 47,000 miles
• Fuel: Diesel
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 308 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 153 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 BMW 6 Series M Sport has covered 47,000 miles. The dealer is asking £20,995, which is £1,338 below the AskCar estimate of £22,333. To work out the AskCar estimate, we analyse UK dealer adverts for 161 BMW 6 Series cars across different ages and specifications. We first recorded this advert 101 days ago, and its asking price has since fallen by £1,900. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Autothentic in York. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,338 (5%) under the AskCar estimate of £22,333.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 161 priced BMW 6 Series adverts across different ages and specifications, as of 5 November 2026.

Time on sale

This 2018 BMW 6 Series has been on sale for at least 101 days.

Price history

AskCar first saw this advert on 27 July 2026 at £22,895. Its asking price is now £20,995, £1,900 less. The latest price cut was seen on 4 November 2026.

Price changes recorded:

• 27 July 2026: £22,895
• 5 August 2026: £22,995
• 26 September 2026: £22,595
• 13 October 2026: £21,995
• 18 October 2026: £21,895
• 20 October 2026: £21,695
• 28 October 2026: £21,495
• 4 November 2026: £20,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 24 November 2026.

It has had 8 MOTs. The latest, on 7 November 2025, passed.

Advisories at the latest test: rear prop shaft flexible coupling slightly deteriorated; nearside rear tyre worn close to legal limit/worn on edge wearing on inner edge.

Mileage at that test: 43,892 miles, which matches the advertised 47,000 miles.

Similar cars

2 other 2018 BMW 6 Series M Sport 3.0 diesel automatic convertibles are for sale at UK dealers, from £25,995 to £27,495, as of 5 November 2026.

The 2 closest to this car in mileage:

• 2018 BMW 6 Series M Sport, 3.0 diesel convertible, blue. Mileage: 26,734 miles. Price: £25,995, £5,000 more than this car. Dealer: Brook Cars Company in Telford. AskCar page: https://askcar.co.uk/car/bmw-6-series-2018-af846f9e5195
• 2018 BMW 6 Series M Sport, 3.0 diesel convertible, grey. Mileage: 10,210 miles. Price: £27,495, £6,500 more than this car. Dealer: V12 Sports & Classics Ltd - Hinckley in Hinckley. AskCar page: https://askcar.co.uk/car/bmw-6-series-2018-a6b85a1b805e